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WO2024199075A1 - Procédé et appareil de réception de données, procédé et appareil d'émission de données, et dispositif de communication - Google Patents

Procédé et appareil de réception de données, procédé et appareil d'émission de données, et dispositif de communication Download PDF

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Publication number
WO2024199075A1
WO2024199075A1 PCT/CN2024/083014 CN2024083014W WO2024199075A1 WO 2024199075 A1 WO2024199075 A1 WO 2024199075A1 CN 2024083014 W CN2024083014 W CN 2024083014W WO 2024199075 A1 WO2024199075 A1 WO 2024199075A1
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WO
WIPO (PCT)
Prior art keywords
data
state variable
rlc layer
discarded
rlc
Prior art date
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Application number
PCT/CN2024/083014
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English (en)
Chinese (zh)
Inventor
张艳霞
陈力
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Publication date
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Publication of WO2024199075A1 publication Critical patent/WO2024199075A1/fr
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1671—Details of the supervisory signal the supervisory signal being transmitted together with control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H04W28/065—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets

Definitions

  • the present application belongs to the field of communication technology, and specifically relates to a data receiving method, a data transmission method, a device and a communication device.
  • the data transmitter or receiver may trigger packet discarding due to congestion control and/or packet dependency.
  • the receiver of the RLC layer maintains a receiving window based on state variables to receive packets falling into the window. If the radio link control (RLC) layer of the transmitter discards packets, the RLC layer of the receiver will generate an RLC sequence number interval (SN). In this case, the receiver will continue to wait for the discarded data, which may cause unnecessary reassembly delays at the data receiving end.
  • RLC radio link control
  • SN RLC sequence number interval
  • data discarding occurs frequently, causing frequent delays at the data receiving end, resulting in low data receiving efficiency at the data receiving end.
  • the embodiments of the present application provide a data receiving method, a data transmission method, an apparatus and a communication device, which can solve the problem of low data receiving efficiency at a data receiving end due to data packets.
  • a data receiving method comprising: a receiving end obtains information of discarded target radio link control RLC layer data; the receiving end updates the data receiving state of the RLC layer based on the information of the discarded target RLC layer data.
  • a data transmission method comprising: a transmitting end discards target RLC layer data; the transmitting end provides first indication information to a receiving end, wherein the first indication information is used to indicate that the target RLC layer data is discarded.
  • a data receiving device which includes: an acquisition module for acquiring information of discarded target radio link control RLC layer data; and an update module for updating the data receiving status of the RLC layer based on the information of the discarded target RLC layer data.
  • a data transmission device which includes: a processing module for discarding target RLC layer data; and a providing module for providing first indication information to a receiving end, wherein the first indication information is used to indicate that the target RLC layer data is discarded.
  • a communication device comprising a processor and a memory, the memory storing a program or instruction that can be run on the processor, the program or instruction being executed by the processor to implement The steps of the data receiving method as described in the first aspect, or the steps of the data transmission method as described in the second aspect.
  • a readable storage medium on which a program or instruction is stored.
  • the program or instruction is executed by a processor, the steps of the data receiving method as described in the first aspect are implemented, or the steps of the data transmission method as described in the second aspect are implemented.
  • a data transmission system comprising: a transmitting end and a receiving end, wherein the receiving end can be used to execute the steps of the data receiving method as described in the first aspect, and the transmitting end can be used to execute the steps of the data transmission method as described in the second aspect.
  • a chip comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instructions to implement the steps of the data receiving method as described in the first aspect, or to implement the steps of the data transmission method as described in the second aspect.
  • a computer program/program product is provided, wherein the computer program/program product is stored in a storage medium, and the program/program product is executed by at least one processor to implement the steps of the data receiving method as described in the first aspect, or to implement the steps of the data transmission method as described in the second aspect.
  • the receiving end obtains information about the discarded target RLC layer data, and then updates the data receiving state of the RLC layer based on the information about the discarded target RLC layer data, thereby enabling the receiving end to update the data receiving state of the RLC layer when it is learned that the RLC layer data cannot be successfully transmitted.
  • This can reduce or avoid unnecessary reorganization delays incurred by the receiving end, improve the data receiving efficiency of the receiving end, and solve the problem of low data receiving efficiency at the data receiving end due to the data sending end discarding the data packet.
  • FIG1 is a block diagram of a wireless communication system to which an embodiment of the present application can be applied;
  • FIG2 is a schematic diagram of a flow chart of a data receiving method in an embodiment of the present application.
  • FIG3 is a flow chart of a data transmission method in an embodiment of the present application.
  • FIG4 is another schematic flow chart of the data transmission method in the embodiment of the present application.
  • FIG5 is a schematic diagram of a structure of a data receiving device in an embodiment of the present application.
  • FIG6 is a schematic diagram of a structure of a data transmission device in an embodiment of the present application.
  • FIG7 is a schematic diagram of the structure of a communication device in an embodiment of the present application.
  • FIG8 is a schematic diagram of the hardware structure of a terminal in an embodiment of the present application.
  • FIG. 9 is a schematic diagram of the hardware structure of a network-side device in an embodiment of the present application.
  • first, second, etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by “first” and “second” are generally of the same type, and the number of objects is not limited.
  • the first object can be one or more.
  • “or” in this application means at least one of the connected objects.
  • “A or B” covers three options, namely, A or B.
  • Option 1 Include A but not B
  • Option 2 Include B but not A
  • Option 3 Include both A and B.
  • the character “/” generally indicates that the objects before and after are in an “or” relationship.
  • indication in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication).
  • a direct indication can be understood as the sender explicitly informing the receiver of specific information, operations to be performed, or request results in the sent indication;
  • an indirect indication can be understood as the receiver determining the corresponding information according to the indication sent by the sender, or making a judgment and determining the operations to be performed or request results according to the judgment result.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single-carrier Frequency-Division Multiple Access
  • NR New Radio
  • 6G 6th Generation
  • FIG1 shows a block diagram of a wireless communication system applicable to an embodiment of the present application.
  • the wireless communication system includes a terminal 11 and a network side device 12.
  • the terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a handheld computer, a netbook, an ultra-mobile personal computer (Ultra-mobile Personal Computer, UMPC), a mobile Internet device (Mobile Internet Device, MID), an augmented reality (Augmented Reality, AR), a virtual reality (Virtual Reality, VR) device, a robot, a wearable device (Wearable Device), an aircraft (flight vehicle), a vehicle user equipment (VUE), a shipborne equipment, a pedestrian terminal (Pedestrian User Equipment, PUE), a smart home (a home appliance with wireless communication function, such as a refrigerator, a television, a washing machine or furniture, etc.), a game console, a personal computer
  • Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc.
  • the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application.
  • the network side device 12 may include an access network device or a core network device, wherein the access network device may also be referred to as a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit.
  • the access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AS) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.
  • WLAN wireless Local Area Network
  • AS Access Point
  • WiFi wireless Fidelity
  • the base station can be called Node B (Node B, NB), Evolved Node B (Evolved Node B, eNB), the next generation Node B (the next generation Node B, gNB), New Radio Node B (New Radio Node B, NR Node B), access point, Relay Base Station (Relay Base Station, RBS), Serving Base Station (Serving Base Station, SBS), Base Transceiver Station (Base Transceiver Station, BTS), Radio Base Station, Radio Transceiver, Basic Service Set (Basic Service Set, BSS), Extended Service Set (Extended Service Set, ESS), Home Node B (home Node B, HNB), Home Evolved B Node
  • the base station is not limited to a specific technical vocabulary as long as the same technical effect is achieved. It should be noted that, in the embodiments of the present application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.
  • AM RLC is a confirmed reception mode RLC.
  • AM RLC needs to successfully receive each data packet, so the receiving end will maintain a sliding window based on the lower boundary push.
  • the AM RLC reception window slide forward.
  • AM RLC maintains the following receive state variables:
  • This state variable is the lower boundary state variable, corresponding to the lower boundary of the receive window, and is used to record the minimum number of data packets waiting to be received in sequence;
  • b.RX_Next_Highest The highest number state variable, used to record the sum of the maximum number of data packets received by the receiver and 1;
  • c.RX_Next_Status_Trigger timer status variable, used to record the sum of the packet number that triggers the timer to start and 1;
  • d.RX_Highest_Status The highest status transmission status variable, used to record the maximum number of packets that can indicate the receive status in the status report;
  • UM RLC is a non-confirmed reception mode RLC.
  • UM RLC does not need to successfully receive every data packet, so the receiving end will maintain a sliding window based on the upper boundary.
  • the UM RLC reception window will slide forward.
  • UM RLC maintains the following receive state variables:
  • reassembly state variable used to record the minimum number of packets still waiting for reassembly
  • b.RX_Next_Highest upper boundary state variable, corresponding to the upper boundary of the receiving window, used to record the sum of the maximum number of data packets received by the receiving end and 1;
  • c.RX_Timer_Trigger Timer state variable, used to record the sum of the packet number that triggers the timer to start and 1.
  • FIG2 shows a flow chart of a data receiving method in an embodiment of the present application.
  • the method 200 may be executed by a receiving end, which may be a terminal or a network side device. As shown in FIG2 , the method 200 may include the following steps.
  • Step 210 The receiving end obtains the number of the discarded target radio link control (RLC) layer. According to the information.
  • RLC radio link control
  • Step 220 The receiving end updates the data receiving status of the RLC layer based on the information of the discarded target RLC layer data.
  • the receiving end determines whether data has been discarded by obtaining information about the target RLC layer data that has been discarded during data transmission.
  • the receiving end updates the data receiving status of the RLC layer based on the information about the discarded target RLC layer data, so that the receiving end does not wait for the discarded target RLC layer data, thereby avoiding unnecessary reassembly delays, improving the data receiving efficiency of the receiving end, and solving the problem of low data receiving efficiency at the data receiving end due to the data sending end discarding the data packet.
  • the manner in which the receiving end obtains the information of the discarded target radio link control RLC layer data may include at least one of the following:
  • the RLC layer of the data transmitting end sends indication information to the RLC layer of the data receiving end, and the indication information indicates that the RLC layer data packet numbered 2 has been discarded by the data transmitting end, then the RLC layer of the data receiving end learns that the data packet numbered 2 has been discarded.
  • the second indication information may be indication information provided by the MAC layer of the data receiving end to the RLC layer of the data receiving end, and the indication information indicates that specific data is discarded, for example, indicating that an RLC protocol data unit (PDU) data packet is discarded.
  • PDU RLC protocol data unit
  • the MAC entity at the data transmitting end notifies the MAC entity at the data receiving end that the MAC PDU carrying the RLC data packet #2 is discarded, and the indication information provided by the MAC layer at the data receiving end to the RLC layer at the data receiving end indicates that the RLC layer data packet numbered 2 is discarded, then the RLC layer at the data receiving end learns that the RLC layer data packet numbered 2 is discarded.
  • the target RLC layer data includes at least one of the following:
  • RLC Protocol Data Unit that is, the discarded RLC data may be one or some RLC PDUs.
  • RLC Service Data Unit that is, the discarded RLC data may be one or some RLC SDUs.
  • RLC data packet fragments That is, the discarded RLC data may be fragments of one or more RLC data packets.
  • the discard situation of the target RLC layer data indicated by the first indication information sent by the above-mentioned data sending end includes the discard situation of at least one of the RLC PDU, RLC SDU and RLC data packet fragments;
  • the discard situation of the target RLC layer data indicated by the second indication information provided by the MAC layer of the above-mentioned data receiving end includes the discard situation of at least one of the RLC PDU, RLC SDU and RLC data packet fragments.
  • the data receiving end discards other fragments of the first data packet that have been received.
  • the data receiving end may determine that the complete first data packet cannot be received. Therefore, for the first data packet that the data receiving end has received Other fragments of the data are also discarded to avoid unnecessary data processing.
  • the above-mentioned step 220 in which the receiving end updates the data reception state of the RLC layer based on the information of the discarded target RLC layer data may include: updating the state variable corresponding to the data reception window based on the information of the discarded target RLC layer data.
  • the state variable corresponding to the data receiving window is updated according to the information about the discarded target RLC layer data, so as to update the data receiving state of the RLC layer.
  • the receiving end no longer waits for the discarded target RLC layer data, thereby avoiding unnecessary reorganization delays and improving the data receiving efficiency of the receiving end.
  • the state variable corresponding to the data receiving window mentioned in the present application can be understood as the receiving end skipping the reception of the target RLC layer data determined to have been discarded, or it can also be understood as the receiving end treating the target RLC layer data determined to have been discarded as having been received and processed, or it can also be that the receiving end triggers a preset delay or timer based on the target RLC layer data determined to have been discarded, and after the preset delay or timer expires (expires), the receiving end skips the reception of the target RLC layer data determined to have been discarded, or the receiving end treats the target RLC layer data determined to have been discarded as having been received and processed.
  • updating the state variable corresponding to the data receiving window can also be understood as reconfiguring or updating the relevant parameters corresponding to the receiving window.
  • updating the state variable corresponding to the data receiving window based on the information of the discarded target RLC layer data may include at least one of the following:
  • the highest-numbered state variable (also referred to as the highest-numbered packet state variable) of the data receiving window (also referred to as the RLC window)
  • the highest-numbered state variable is updated to a first state variable value, wherein the first state variable value corresponds to the sum of the maximum packet number of the discarded target RLC layer data and 1, that is, the first state variable value is the maximum packet number of the discarded target RLC layer data + 1.
  • RX_NEXT 0 of the data receiving window
  • the first RLC data packet waiting to be received may be the data packet with the smallest number among the data packets that the receiving end is waiting to receive completely.
  • the receiving window can be moved forward by updating the lower boundary state variable, avoiding unnecessary delays caused by waiting for the data packets corresponding to the window lower boundary state variable that have been discarded.
  • the highest state transmission state variable is updated to a third state variable value, wherein the third state variable value is the number of the first non-discarded RLC layer data packet after the discarded data packet of the target RLC layer data, or the third state variable value is the number of the first RLC data packet waiting to be received after the discarded data packet of the target RLC layer data.
  • the first RLC data packet waiting to be received may be the data packet with the smallest number among the data packets that the receiving end is waiting to receive completely.
  • updating the state variable corresponding to the data receiving window based on the information of the discarded target RLC layer data may include:
  • the reassembly timer When the reassembly timer is running, if a first condition is met, the reassembly timer is stopped, wherein the first condition may include one of the following:
  • the state variable value corresponding to the timer variable is equal to the lower boundary state variable value of the data receiving window
  • the state variable value of the timer state variable is equal to the sum of the lower boundary state variable of the data receiving window and 1, and only the last fragment of the data packet corresponding to the lower boundary state variable has not been received.
  • the receiving end since there is no reception gap at the receiving end, and the reassembly timer is used to detect the reception gap to wait for the data packets to arrive in sequence, the receiving end needs to stop the reassembly timer in the above conditions.
  • the receiving end confirms the AM RLC entity.
  • the state variable corresponding to the data receiving window has been updated.
  • the reassembly timer is stopped and the discarded target RLC data is no longer waited.
  • the method of discarding the target RLC layer data and updating the state variable corresponding to the data receiving window may include: when the reassembly timer is not running, if a second condition is met, starting the reassembly timer and updating the timer state variable to a fourth state variable value, wherein the second condition includes one of the following:
  • the value of the highest numbered state variable is greater than the sum of the lower boundary state variable value of the data receiving window and 1;
  • the value of the highest-numbered state variable is equal to the sum of the value of the lower boundary state variable of the data receiving window and 1, and the data packet corresponding to the lower boundary state variable has at least one data packet fragment that has not been received;
  • the fourth state variable value is equal to the state variable value corresponding to the highest numbered state variable.
  • the receiving end since a receiving gap occurs at the receiving end, and the reassembly timer is used to detect the receiving gap to wait for data packets to arrive in sequence, the receiving end needs to start the reassembly timer in the above conditions.
  • the receiving end is to confirm the AM RLC entity.
  • the reassembly timer is not running and one of the conditions (1) (2) above is met, the target RLC layer data is discarded, then the reassembly timer is started and the timer state variable is updated to the highest numbered state variable to update the state variable corresponding to the data receiving window.
  • the reassembly timer is restarted and the timer state variable RX_Next_Status_Trigger is updated to a fourth state variable value, which is equal to the RX_Next_Highest value.
  • updating the state variable corresponding to the data receiving window based on the discarded target RLC layer data may include at least one of the following:
  • the state variable of the packet to be reassembled is updated to a fifth state variable value, wherein the value of the fifth state variable is the number of the first RLC layer data packet that has not been discarded after the packet of the discarded target RLC layer data, or the value of the fifth state variable is the number of the first RLC layer data packet that is still waiting for reassembly after the packet of the discarded target RLC layer data.
  • the state variable of the packet to be reassembled is updated to the fifth state variable value, thereby avoiding unnecessary reassembly delay caused by the RLC SN interval due to packet discard.
  • the first RLC data packet waiting to be received may be the RLC data packet that the receiving end is waiting to receive completely.
  • the value of the sixth state variable is 6.
  • the value of the sixth state variable is 3.
  • updating the state variable corresponding to the data receiving window based on the discarded target RLC layer data may include: when the state variable of the data packet to be reassembled falls outside the data receiving window, updating the state variable of the data packet to be reassembled to a seventh state variable value, wherein the seventh state variable value is the minimum number corresponding to the data packets waiting for reassembly in the data receiving window.
  • the situation where the state variable RX_Next_Reassembly of the data packet to be reassembled falls outside the data receiving window may include that RX_Next_Reassembly is less than RX_Next_Highest-UM_Window.
  • updating the state variable corresponding to the data receiving window based on the discarded target RLC layer data may include: when the reassembly timer is running, if a third condition is met, stopping the reassembly timer, wherein the third condition includes one of the following:
  • the timer state variable is less than or equal to the state variable of the packet to be reassembled
  • the upper boundary state variable value of the data receiving window is equal to the sum of the state variable value of the data packet to be reassembled and 1, and the data packet corresponding to the state variable of the data packet to be reassembled has only the last fragment not received.
  • the receiving end is a non-confirmed UM RLC layer.
  • the state variable corresponding to the data receiving window has been updated.
  • the reassembly timer is stopped and the discarded target RLC data is no longer waited.
  • updating the state variable corresponding to the data receiving window based on the discarded target RLC layer data may include: when the reassembly timer is not running, if the fourth condition is met, restarting the reassembly timer and updating the timer state variable to an eighth state variable value, wherein the fourth condition may include one of the following:
  • the state variable value of the upper boundary state variable of the data receiving window is greater than the sum of the state variable value of the state variable to be reorganized and 1;
  • the state variable value of the upper boundary state variable of the data receiving window is equal to the sum of the state variable value of the state variable to be reassembled and 1, and at least one fragment of the data packet corresponding to the state variable of the data packet to be reassembled has not been received;
  • the eighth state variable value is equal to the state variable value of the upper boundary state variable.
  • the receiving end is a non-confirmed UM RLC layer.
  • the target RLC layer data is discarded, then the reassembly timer is started and the timer state variable is updated to the highest numbered state variable to update the state variable corresponding to the data receiving window.
  • the receiving end obtains information about the target RLC layer data discarded in the data transmission by receiving the first indication information sent by the sending end or the second indication information provided by the MAC layer of the receiving end, and determines whether to send In the case where data is discarded, the receiving end updates the data receiving window of the RLC layer based on the discarded target RLC layer data, for example, updates the data receiving state of the RLC layer, or discards other fragments of the first data packet when the discarded RLC layer data is a fragment of the first data packet.
  • the receiving end does not wait for the discarded target RLC data, thereby avoiding unnecessary reassembly delay at the receiving end, improving the data receiving efficiency of the receiving end, and solving the problem of low data receiving efficiency at the data receiving end due to the discarding of data packets by the data sending end.
  • FIG3 shows a flow chart of a data receiving method in an embodiment of the present application.
  • the method 300 may be executed by a data sending end, which may be a terminal or a network side device. As shown in FIG3 , the method 300 may include the following steps.
  • Step 310 The transmitting end discards the target RLC layer data.
  • Step 320 The transmitting end provides first indication information to the receiving end, wherein the first indication information is used to indicate that the target RLC layer data is discarded.
  • the data transmitting end may provide the first indication information to the receiving end, so as to indicate that the target RLC layer data packet is discarded through the first indication information. Then the receiving end may obtain the information of the target RLC layer data discarded in the data transmission through the first indication information, and then update the data receiving state of the RLC layer based on the information of the discarded target RLC layer data, so as to avoid unnecessary reassembly delay in the receiving end and improve the data receiving efficiency of the receiving end.
  • the target RLC layer data includes at least one of the following:
  • the discard situation of the target RLC layer data indicated by the first indication information sent by the data sending end includes the discard situation of at least one of the RLC PDU, RLC SDU and RLC data packet fragment.
  • FIG4 shows another flow chart of the data transmission method in an embodiment of the present application in an optional implementation manner.
  • the method 400 may include the following steps.
  • Step 410 The transmitting end discards the target RLC layer data. This step is the same as the above step 310, and please refer to the description in the above method 300 for details.
  • the AM RLC entity at the transmitting end updates the lower boundary state variable of the data sending window to a ninth state variable value, wherein the ninth state variable value is the number of the first non-discarded RLC layer data packet after the discarded target RLC layer data or the number of the first data packet after the discarded target RLC layer data that is waiting for the receiving end to feedback successful transmission.
  • the first RLC data packet waiting to be received may be the data packet with the smallest number among the data packets that the receiving end is waiting to receive completely.
  • TX_Next_Ack 2 of the data transmitting window of the data transmitting end
  • Step 430 The transmitting end provides first indication information to the receiving end, wherein the first indication information is used to indicate that the target RLC layer data is discarded.
  • This step is the same as the above step 320, and please refer to the description in the above method 300 for details.
  • the transmitting end after the transmitting end discards the target RLC layer data, the transmitting end first updates the lower boundary state variable of the data transmission window to the number of the first RLC layer data packet that has not been discarded, and then provides the first indication information to the receiving end to indicate that the target RLC layer data is discarded, and then when the receiving end receives the first indication information, it determines that the target The RLC layer data is discarded, thereby updating the target RLC layer data receiving state, avoiding unnecessary reassembly delay at the receiving end, and improving the data receiving efficiency at the receiving end.
  • the first indication information includes at least one of the following:
  • the number of the RLC layer data packet such as the RLC sequence number (SN).
  • RLC layer segment information such as at least one of the starting position and the ending position of the RLC layer segment in the RLC data packet.
  • the number of RLC layer data packets is used to indicate the number of consecutive complete RLC layer data packets that have been discarded. For example, if the sender indicates that the RLC layer data packet numbered 1 and the number of data packets numbered 1 is 3, then when the receiver obtains this information, it can be known that data packets 1/2/3 have all been discarded.
  • the first indication information may include a number range of RLC layer data packets. For example, if the RLC layer discards data packets numbered #1, #2, and #3, the first indication information may carry an RLC number range of #1 to 3.
  • the sending end providing the first indication information to the receiving end in step 320 may include one of the following:
  • the transmitting end sends the first indication information via an RLC control protocol data unit (control PDU);
  • the data sending end sends an indication message that the target RLC data is discarded to the receiving end by setting the control protocol data unit type (CPT) field, so as to inform the data receiving end that the target RLC data of the RLC control PDU is discarded.
  • CPT control protocol data unit type
  • the sending end sends the first indication information through an RLC data protocol data unit.
  • the RLC PDU data in the first indication information sent by the data sending end through the RLC data protocol data unit may be a data packet that does not contain data payload.
  • the sending end submits a data packet to the bottom layer
  • the data packet carrying the first indication information has the highest priority
  • the sending end gives priority to transmitting the data packet carrying the above-mentioned first indication information when submitting the data packet to the bottom layer, so that the data receiving end gives priority to receiving and processing the information of the discarded target RLC layer data, further improving the data receiving efficiency of the data receiving end.
  • the transmitting end delivers a data packet to the bottom layer
  • the data packet carrying the discarded target RLC layer data has the lowest priority
  • the transmitting end When delivering data packets to the bottom layer, the transmitting end gives the data packets carrying the discarded target RLC layer data the lowest priority, so that the data packets that are not discarded are delivered first, thereby improving data transmission efficiency.
  • the transmitting end when the transmitting end delivers a data packet to the bottom layer, it may not transmit a retransmission data packet carrying the discarded target RLC layer data packet/fragment.
  • the sending end before the sending end provides the first indication information to the receiving end, the sending end obtains Any of the following information:
  • first switch indication information where the first switch indication information is used to enable or disable a function of the RLC entity at the transmitting end sending the first indication information to the receiving end when discarding RLC data;
  • the third switch indication information is used to enable or disable a function of the UM RLC entity of the transmitting end to send the first indication information to the receiving end when discarding RLC data;
  • first configuration information configures the AM RLC entity at the transmitting end to send the first indication information to the receiving end when discarding RLC data
  • Second configuration information configures the AM RLC entity and the UM RLC entity at the sending end to send the first indication information to the receiving end when discarding RLC data.
  • the first configuration information and the second configuration information may be agreed upon by a protocol or configured by a network.
  • the sending end before providing the first indication information to the receiving end, obtains any one of the above information (1)(2)(3)(4)(5) to indicate whether the sending end enables the function of sending indication information to the receiving end in various situations, and whether the sending end sends indication information to the receiving end.
  • the data receiving method provided in the embodiment of the present application can be executed by a data receiving device.
  • the data receiving device provided in the embodiment of the present application is described by taking the data receiving method executed by the data receiving device as an example.
  • FIG5 shows a schematic structural diagram of a data receiving device in an embodiment of the present application.
  • the device 500 is applied to a receiving end.
  • the device 500 includes: an acquisition module 51 and an update module 52 .
  • the acquisition module 51 is used to acquire the information of the discarded target radio link control RLC layer data; the update module 52 is used to update the data receiving state of the RLC layer based on the information of the discarded target RLC layer data.
  • the acquisition module 51 may be used for at least one of the following:
  • the target RLC layer data includes at least one of the following:
  • the above-mentioned data receiving device 500 further includes a discarding module, which is used for the data receiving end to discard other fragments of the first data packet that have been received when the target RLC layer data is a fragment of the first data packet.
  • the updating module 52 may be configured to update a state variable corresponding to a data receiving window based on information of the discarded target RLC layer data.
  • the updating module 52 may be used for at least one of the following:
  • the highest state transmission state variable is updated to a third state variable value, wherein the third state variable value is the number of the first non-discarded RLC layer data packet after the discarded data packet of the target RLC layer data, or the third state variable value is the number of the first RLC data packet waiting to be received after the discarded data packet of the target RLC layer data.
  • the updating module 52 may be used to: when the reassembly timer is running, if a first condition is met, stop the reassembly timer, wherein the first condition includes one of the following:
  • the state variable value corresponding to the timer state variable is equal to the lower boundary state variable value of the data receiving window
  • the state variable value of the timer state variable is equal to the sum of the lower boundary state variable of the data receiving window and 1, and only the last fragment of the data packet corresponding to the lower boundary state variable has not been received.
  • the updating module 52 may be used to: when the reassembly timer is not running, if the second condition is met, start the reassembly timer and update the timer state variable to a fourth state variable value, wherein the second condition includes one of the following:
  • the value of the highest numbered state variable is greater than the sum of the lower boundary state variable value of the data receiving window and 1;
  • the value of the highest-numbered state variable is equal to the sum of the value of the lower boundary state variable of the data receiving window and 1, and the data packet corresponding to the lower boundary state variable has at least one data packet fragment that has not been received;
  • the fourth state variable value is equal to the state variable value corresponding to the highest numbered state variable.
  • the updating module 52 may be used for at least one of the following:
  • the update module 52 can be used for: when the state variable of the data packet to be reassembled falls outside the data receiving window, updating the state variable of the data packet to be reassembled to a seventh state variable value, wherein the seventh state variable value is the minimum number corresponding to the data packets waiting for reassembly in the data receiving window.
  • the updating module 52 may be used to: when the reassembly timer is running, if a third condition is met, stop the reassembly timer, wherein the third condition includes one of the following:
  • the timer state variable is less than or equal to the state variable of the packet to be reassembled
  • the upper boundary state variable value of the data receiving window is equal to the sum of the state variable value of the data packet to be reassembled and 1, and the data packet corresponding to the state variable of the data packet to be reassembled has only the last fragment not received.
  • the updating module 52 may be used to: when the reassembly timer is not running, if a fourth condition is met, restart the reassembly timer and update the timer state variable to an eighth state variable value, wherein the fourth condition includes one of the following:
  • the state variable value of the upper boundary state variable of the data receiving window is greater than the sum of the state variable value of the state variable to be reorganized and 1;
  • the state variable value of the upper boundary state variable of the data receiving window is equal to the sum of the state variable value of the state variable to be reassembled and 1, and at least one fragment of the data packet corresponding to the state variable of the data packet to be reassembled has not been received;
  • the eighth state variable value is equal to the state variable value of the upper boundary state variable.
  • the data receiving device provided in the embodiment of the present application can implement each process implemented by the data receiving method embodiment of Figure 2 and achieve the same technical effect. To avoid repetition, it will not be repeated here.
  • the data transmission method provided in the embodiment of the present application can be executed by a data transmission device.
  • the data transmission method executed by a data transmission device is taken as an example to illustrate the data transmission device provided in the embodiment of the present application.
  • FIG6 shows a schematic structural diagram of a data transmission device in an embodiment of the present application.
  • the device 600 is applied to a sending end.
  • the device 600 includes: a processing module 61 and a providing module 62 .
  • the processing module 61 is used to discard the target RLC layer data; the providing module 62 is used to provide first indication information to the receiving end, wherein the first indication information is used to indicate that the target RLC layer data is discarded.
  • the target RLC layer data packet includes at least one of the following:
  • the above-mentioned data transmission device 600 also includes a second update module, which is used to update the lower boundary state variable of the data sending window to a ninth state variable value, wherein the ninth state variable value is the number of the first RLC layer data packet that has not been discarded or the number of the first data packet waiting for feedback from the receiving end on successful transmission.
  • the first indication information includes at least one of the following:
  • the number of RLC layer data packets is used to indicate the number of consecutive complete RLC layer data packets that are discarded.
  • the providing module 62 may be used for one of the following:
  • the sending end delivers a data packet to the bottom layer
  • the data packet carrying the first indication information has the highest priority
  • the transmitting end delivers a data packet to the bottom layer
  • the data packet carrying the discarded target RLC layer data has the lowest priority
  • the data transmission device 600 further includes an acquisition module, which is used to acquire any one of the following information:
  • first switch indication information where the first switch indication information is used to enable or disable a function of the RLC entity at the transmitting end sending the first indication information to the receiving end when discarding RLC data;
  • the third switch indication information is used to enable or disable a function of the UM RLC entity of the transmitting end to send the first indication information to the receiving end when discarding RLC data;
  • first configuration information configures the AM RLC entity at the transmitting end to send the first indication information to the receiving end when discarding RLC data
  • Second configuration information configures the AM RLC entity and the UM RLC entity at the sending end to send the first indication information to the receiving end when discarding RLC data.
  • the first configuration information and the second configuration information may be agreed upon by a protocol or configured by a network.
  • the data transmission device provided in the embodiment of the present application can implement the various processes implemented in the method embodiments of Figures 3 to 4 and achieve the same technical effect. To avoid repetition, it will not be repeated here.
  • the data receiving device and the data transmission device in the embodiments of the present application can be electronic devices, such as electronic devices with an operating system, or components in electronic devices, such as integrated circuits or chips.
  • the electronic device can be a terminal, or other devices other than a terminal.
  • the terminal can include but is not limited to the types of terminals 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.
  • the embodiment of the present application further provides a communication device 700, including a processor 701 and a memory 702, wherein the memory 702 stores a program or instruction that can be run on the processor 701.
  • the communication device 700 is a terminal
  • the program or instruction is executed by the processor 701 to implement the various steps of the above-mentioned data receiving method embodiment or the various steps of the above-mentioned data transmission method embodiment, and can achieve the same technical effect.
  • the communication device 700 is a network side device
  • the program or instruction is executed by the processor 701 to implement the various steps of the above-mentioned data receiving method embodiment or the various steps of the above-mentioned data transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.
  • the embodiment of the present application also provides a terminal, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps in the data receiving method embodiment shown in FIG2, or to implement the steps in the data transmission method embodiment shown in FIG3 to FIG4.
  • This terminal embodiment corresponds to the above-mentioned terminal side method embodiment, and each implementation process and implementation method of the above-mentioned method embodiment can be applied to the terminal embodiment and can achieve the same technical effect.
  • FIG8 is a hardware structure of a terminal implementing an embodiment of the present application. Schematic diagram.
  • the terminal 800 includes but is not limited to: a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809 and at least some of the components of a processor 810.
  • the terminal 800 may also include a power source (such as a battery) for supplying power to each component, and the power source may be logically connected to the processor 810 through a power management system, so as to implement functions such as managing charging, discharging, and power consumption management through the power management system.
  • a power source such as a battery
  • the terminal structure shown in FIG8 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown, or combine certain components, or arrange components differently, which will not be described in detail here.
  • the input unit 804 may include a graphics processing unit (GPU) 8041 and a microphone 8042, and the graphics processor 8041 processes the image data of the static picture or video obtained by the image capture device (such as a camera) in the video capture mode or the image capture mode.
  • the display unit 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc.
  • the user input unit 807 includes a touch panel 8071 and at least one of other input devices 8072.
  • the touch panel 8071 is also called a touch screen.
  • the touch panel 8071 may include two parts: a touch detection device and a touch controller.
  • Other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (such as a volume control key, a switch key, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.
  • the radio frequency unit 801 after receiving downlink data from the network side device, can transmit the data to the processor 810 for processing; in addition, the radio frequency unit 801 can send uplink data to the network side device.
  • the radio frequency unit 801 includes but is not limited to an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.
  • the memory 809 can be used to store software programs or instructions and various data.
  • the memory 809 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instruction required for at least one function (such as a sound playback function, an image playback function, etc.), etc.
  • the memory 809 may include a volatile memory or a non-volatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory.
  • the volatile memory may be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM) and a direct memory bus random access memory (DRRAM).
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • DDRSDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM synchronous link dynamic random access memory
  • DRRAM direct memory bus random access memory
  • the processor 810 may include one or more processing units; optionally, the processor 810 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It is understandable that the modem processor may not be integrated into the processor 810.
  • the processor 810 is configured to: obtain information about the discarded target radio link control RLC layer data; and update the data receiving state of the RLC layer based on the information about the discarded target RLC layer data.
  • the processor 810 is used to discard the target RLC layer data; the radio frequency unit 801 is used to provide first indication information to the receiving end, wherein the first indication information is used to indicate that the target RLC layer data is discarded.
  • the embodiment of the present application also provides a network side device, including a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run a program or instruction to implement the steps of the data receiving method embodiment shown in Figure 2, or to implement the steps of the data transmission method embodiment shown in Figures 3 to 4.
  • This network side device embodiment corresponds to the above network side device method embodiment, and each implementation process and implementation method of the above method embodiment can be applied to this network side device embodiment, and can achieve the same technical effect.
  • the embodiment of the present application also provides a network side device.
  • the network side device 900 includes: an antenna 91, a radio frequency device 92, a baseband device 93, a processor 94 and a memory 95.
  • the antenna 91 is connected to the radio frequency device 92.
  • the radio frequency device 92 receives information through the antenna 91 and sends the received information to the baseband device 93 for processing.
  • the baseband device 93 processes the information to be sent and sends it to the radio frequency device 92.
  • the radio frequency device 92 processes the received information and sends it out through the antenna 91.
  • the method executed by the network-side device in the above embodiment may be implemented in the baseband device 93, which includes a baseband processor.
  • the baseband device 93 may include, for example, at least one baseband board, on which a plurality of chips are arranged, as shown in FIG. 9 , wherein one of the chips is, for example, a baseband processor, which is connected to the memory 95 through a bus interface to call a program in the memory 95 and execute the network device operations shown in the above method embodiment.
  • the network side device may also include a network interface 96, which is, for example, a Common Public Radio Interface (CPRI).
  • CPRI Common Public Radio Interface
  • the network side device 900 of the embodiment of the present application also includes: instructions or programs stored in the memory 95 and executable on the processor 94.
  • the processor 94 calls the instructions or programs in the memory 95 to execute the methods executed by the modules shown in Figures 5 to 6 and achieve the same technical effect. To avoid repetition, it will not be repeated here.
  • An embodiment of the present application also provides a data transmission system, including a transmitting end and a receiving end, wherein the transmitting end is used to implement the various processes of the above-mentioned data transmission method embodiment; the receiving end is used to implement the various processes of the above-mentioned data receiving method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.
  • An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored.
  • a program or instruction is stored.
  • the various processes of the above-mentioned data receiving method embodiment are implemented, or the various processes of the above-mentioned data transmission method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.
  • the processor is the processor in the terminal described in the above embodiment.
  • the readable storage medium includes a computer readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk.
  • the readable storage medium may be a non-transient readable storage medium.
  • An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned data receiving method embodiment, or to implement the various processes of the above-mentioned data transmission method embodiment and achieve the same technical effect. To avoid repetition, it will not be repeated here.
  • chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip, a chip system or a chip System on chip, etc.
  • the embodiments of the present application further provide a computer program/program product, which is stored in a storage medium, and is executed by at least one processor to implement the various processes of the above-mentioned data receiving method embodiment, or to implement the various processes of the above-mentioned data transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

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Abstract

La présente demande concerne un procédé et un appareil de réception de données, un procédé et un appareil d'émission de données, et un dispositif de communication. Le procédé de réception de données comprend les étapes suivantes : une extrémité de réception acquiert des informations sur des données de couche de contrôle de liaison radio (RLC) cibles rejetées ; et l'extrémité de réception actualise un état de réception des données d'une couche RLC sur la base des informations des données de couche RLC cibles rejetées.
PCT/CN2024/083014 2023-03-24 2024-03-21 Procédé et appareil de réception de données, procédé et appareil d'émission de données, et dispositif de communication Pending WO2024199075A1 (fr)

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CN202310302396.4A CN118694486A (zh) 2023-03-24 2023-03-24 数据接收方法、数据传输方法、装置及通信设备
CN202310302396.4 2023-03-24

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CN1829187A (zh) * 2005-02-28 2006-09-06 华为技术有限公司 一种保持分组数据协议汇聚子层序列号同步的方法
CN1832389A (zh) * 2005-03-08 2006-09-13 华为技术有限公司 无线通信系统中链路控制层协商丢弃信息的实现方法
CN104836646A (zh) * 2014-02-12 2015-08-12 普天信息技术研究院有限公司 一种rlc am模式传输可靠性增强方法
CN114268991A (zh) * 2021-12-27 2022-04-01 展讯通信（上海）有限公司 数据传输方法、装置、电子设备、存储介质

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Publication number Priority date Publication date Assignee Title
KR20020028095A (ko) * 2000-10-07 2002-04-16 구자홍 래디오 링크 콘트롤(ｒｌｃ)에서 서비스 데이터유닛(ｓｄｕ)의 디스카드 처리 방법
CN1829187A (zh) * 2005-02-28 2006-09-06 华为技术有限公司 一种保持分组数据协议汇聚子层序列号同步的方法
CN1832389A (zh) * 2005-03-08 2006-09-13 华为技术有限公司 无线通信系统中链路控制层协商丢弃信息的实现方法
CN104836646A (zh) * 2014-02-12 2015-08-12 普天信息技术研究院有限公司 一种rlc am模式传输可靠性增强方法
CN114268991A (zh) * 2021-12-27 2022-04-01 展讯通信（上海）有限公司 数据传输方法、装置、电子设备、存储介质

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